RS-485接口ESD靜電保護芯片

SM712AsymmetricalTVSMechanicalCharacteristics

DescriptionTheSM712designedforasymmetrical(12Vto–7V)•Package:SOT-23protectionmulti-pointdatatransmissionapplication,•Finish:MatteTin

TheSM712replacefourdiscretecomponentsbyinte-•CaseMaterial:“Green”MoldingCompound.

gratingtwo12Vandtwo7VTVSdiodesasinglepack-•FlammabilityClassificationRating94V-0TheSM712compliestheIEC61000-4-2•MoistureSensitivity:Level3J-STD-020standard±15kVand±8kVcontactdis-•TerminalConnections:DiagramBelowcharge.Itassembledintoalead-freeSOT-23package.•MarkingInformation:SeeBelowItdesignedtoprotectcomponentswhichareconnectedtodataandtransmissionlinesfromvoltagesurges.ApplicationsFeatures•Wireless•pulse(8/20µs)•Ultralowleakage:level•Operatingvoltage:12V•Networks•PortableInstrumentation•RS485Ports•LowclampingvoltageMarkingInformation•Compliesfollowingstandards:–61000-4-2(ESD)immunitytestdischarge:±30kVContactdischarge:±30kV3–IEC61000-4-4(EFT)(5/50ns)–IEC61000-4-5(Lightning)(8/20µs)712•Compliant12DimensionsandPinConfigurationOrderingInformationNumberPackagingSizeSM7123000/Tape&Reel7inchCircuitSchematicSchematic聯系電話生QQ:1043189095SM712AbsoluteMaximumRatings(T=25°Cunlessotherwisespecified)ParameterSymbolValueUnitPulsePower(8/20µs)WPulseCurrent(8/20µs)IppAIEC61000−4−2(Air)IEC61000−4−2(Contact)ESD±30±30kVOperatingTemperatureRangeTJto+125StorageTemperatureRangeTstgto+150ElectricalCharacteristics=25°Cunlessotherwisespecified)Pin1to3and2to3Pin3to1and3to2(12V(7VParameterSymbolMinMaxMinMaxUnitConditionReverseWorkingVoltageRWM7VBreakdownVoltageBR7.5VIT=1mAReverseLeakageCurrentIR2.0R=RWMClampingVoltageCVIPP=(8xpulse)ClampingVoltageCVIPP=(8xpulse)JunctionCapacitanceCJ=0V,f=1MHzJunctionCapacitanceCJ=RWM,f=1MHz聯系電話生QQ:1043189095SM712TypicalPerformanceCharacteristics(T=25°CunlessotherwiseSpecified)80.001070.0060.00150.0040.0030.00

0.120.0010.000.010.00036912ReverseVoltage_VR(V)0.1110PulseDuration_tp(uS)JunctionCapacitancevs.ReverseVoltagePeakPulsePowervs.PulseTime30251to32

20801560

3to1310405200005101520PeakPulseCurrent_Ipp(A)0255075100125150AmbientTemperature_Ta(℃)PowerDeratingCurveClampingVoltagevs.PeakPulseCurrent10090807060504030201000206080

Time_t(uS)8X20usPulseWaveform聯系電話生QQ:1043189095SM712SM712onRS-485LinesApplicationRS-485specifiesa±7Vgrounddifferencebetweendevicesthebus.Thispermitsthevoltagetorangefrom+12V(5V+7V)to-7V(0-7V).TheSM712designedtoprotecttwoRS-485datalinesextendedcommonmodeapplications.TheSM712mayusedtoprotectdevicesfromtransientvoltagesresultingfromEFT,andlightning.Thedevicedesignedasymmetricaloperatingvoltagesforoptimumprotection.TheTVSatpins1and2haveaworkingvoltage12volts.Thesepinsareconnectedtothedifferentialdatalinepairs.TheTVSdiodes3haveaworkingvoltage7volts.Pin3connectedtoground.TheinternalTVSdiodestheSM712willprotectthetransceiverinputfrompositivetransientvoltagespikesgreaterth